Calculate your quiz grade
Choose a common letter-grade scale or enter a custom A-grade cutoff.
How the Quiz Grade Calculator works
The Quiz Grade Calculator divides correct answers by total questions and multiplies the result by 100. It then compares the percentage with the selected grading scale. This makes it useful for quizzes, worksheets, short tests, practice exams, and self-study checks.
Worked example
If 18 of 20 questions are correct, the calculation is 18 ÷ 20 × 100 = 90%. Two answers are incorrect. On a standard scale where an A starts at 90%, the result is an A.
Letter-grade reference
| Letter | 90% A scale | Typical meaning |
|---|---|---|
| A | 90–100% | Excellent |
| B | 80–89.99% | Good |
| C | 70–79.99% | Satisfactory |
| D | 60–69.99% | Limited passing |
| F | Below 60% | Not passing |
How to use the Quiz Grade Calculator
- Enter the number of questions answered correctly.
- Enter the total number of quiz questions.
- Select the grading scale used by the teacher.
- Calculate to see percentage, letter grade, and incorrect answers.
- Download the result as PDF or Excel when needed.
Note: Teachers may use plus/minus grades, rounding, partial credit, or custom cutoffs. Compare this estimate with the course syllabus.
Understanding quiz percentages
Every question has equal value when all questions carry the same number of points. On a 20-question quiz, each question is worth 5 percentage points. On a 40-question quiz, each question is worth 2.5 percentage points. If questions have different point values, use the Assignment Grade Calculator after it is available.
Explore the Test Grade Calculator, Grade Calculator, or all Education Calculators. For general education statistics, visit the National Center for Education Statistics.
Frequently asked questions
How many questions did I miss?
The calculator subtracts correct answers from total questions.
Can a quiz score exceed 100%?
Not with ordinary correct-answer scoring. Extra credit should be handled as bonus points.
Does the calculator round?
It displays the percentage to two decimals while using the full value to select the letter grade.
Is every grading scale the same?
No. Select the closest option and verify the official class policy.